Book Image

Learn React with TypeScript - Second Edition

By : Carl Rippon
4.4 (8)
Book Image

Learn React with TypeScript - Second Edition

4.4 (8)
By: Carl Rippon

Overview of this book

Reading, navigating, and debugging a large frontend codebase is a major issue faced by frontend developers. This book is designed to help web developers like you learn about ReactJS and TypeScript, both of which power large-scale apps for many organizations. This second edition of Learn React with TypeScript is updated, enhanced, and improved to cover new features of React 18 including hooks, state management libraries, and features of TypeScript 4. The book will enable you to create well-structured and reusable React components that are easy to read and maintain, leveraging modern design patterns. You’ll be able to ensure that all your components are type-safe, making the most of TypeScript features, including some advanced types. You’ll also learn how to manage complex states using Redux and how to interact with a GraphQL web API. Finally, you’ll discover how to write robust unit tests for React components using Jest. By the end of the book, you’ll be well-equipped to use both React and TypeScript.
Table of Contents (19 chapters)
1
Part 1: Introduction
6
Part 2: App Fundamentals
10
Part 3: Data
14
Part 4: Advanced React

Using React Hook Form

In this section, we will learn about React Hook Form and use it to improve the validation user experience in our contact form.

Understanding React Hook Form

As the name suggests, React Hook Form is a React library for building forms. It is very flexible and can be used for simple forms such as our contact form, as well as large forms with complex validation and submission logic. It is also very performant and optimised not to cause unnecessary re-renders. It is also very popular with tens of thousands of GitHub stars and maturing nicely having been first released in 2019.

The key part of React Hooks Form is a useForm hook, which returns useful functions and the state. The following code snippet shows the useForm hook being called:

const {
  register,
  handleSubmit,
  formState: { errors, isSubmitting, isSubmitSuccessful }
} = useForm<FormData>();

useForm has a generic type parameter for the type of the field...